Striking-plate tile-making machine



A. MULLER.

STRIKiNG PLATE TILE MAKING MACHINE,

APPLICATION man APR. 1. 192a.

2 SHEETS-SHUT I.

A. MULLER.

STRIKING PLATE TILE MAKING MACHINE.

Patented Jan. 25; 1921.

Z $HEET$SHEET 2 APPLICATION FILED APR. I. 1920.

UNITED STATES,

Parser orrics.

I ARTHUR Ml'lLLER, 0E CHARLOTTENBURG, NEAR BERLIN, GERMANY.

STRIKING-PLATE TILE-MAKING MACHINE.

Specification of Letters Patent.

Patented Jan. 25, 1921.

Application sled April 1, 1920. Serial No. 370,602.

certain new and useful Improvements in Striking-Plate TileMaking Machines, of which the following is a specification.

This invention relates in general to a machine for making roofing tiles of granular material such as cement and more particularly to a machine of this kind that is provided with a patting or striking plate, and in which the forming or molding of the roofing tile is carried out by striking the material with a striking plate and subsequently smoothening its surface by shaving or skimming 03 its protuberant parts with the aid of the said plate. Nhen this has been done the striking plate, which was pushed backward in carrying out the shaving operation, has to be moved to the front again into the position in which it can be used for patting the next tile. When the plate is thus moved to its front position it has to be kept raised so as to prevent its shaving away the materials that are heaped up in the mold and ready to be formed into a tile by patting with the striking plate.

The striking motion is brought about in machines of this kind by lifting the plate vertically to its plane and quickly letting it drop again by means of cam blocks or eccentrically journaled rolls.

The shaving motion is executed by pushing the striking plate backward while holding it in a slightly inclined position, the plate being guided during its backward motion by a sliding guide member. The plate is then lifted and moved forward again in the same sliding guide member into the position in which it is used for striking the next brick or tile.

An advantage gained by using eccentrically journaled rolls to obtain the striking motion is that the rolls enable the plate to be easily shifted to and fro. Buta serious disadvantage of this arrangement is that the rolls and their pivots are subjected to very heavy stresses by the violent blows of the plate.

i For this reason cam blocks with straight bearing surfaces have been used instead of eccentrically journaled rolls. By rocking the cam block to and fro the striking plate was swung and raised alternately about the front and rear edges of the cam blocks. l/Vhen shifted in a raised position the plate .rested on one of the edges, the left edge,

of the bearing surfaces of the blocks. This gave rise to two drawbacks. One was the excessive wear of this edge and attempts were made to overcome it by providing the bottom surface of the cam block with a renewable steel strip. The second drawback was that the bearing of the striking plate upon the sharp edge of the cam block caused the friction and the resistance offered by the plate when moved to be considerably increased. To overcome this resistance the expedient was adopted of shifting the striking plate by a special shifting handle with the aid of interposed levers.

Another drawback of the known machine was that the rolls or cam blocks upon which the shifting motion was executed were displaced between guidebars. Since thespace between the guide bars'and the supporting beams was very prone to become filled with the material of which the tile was made when it was put into the molding box, and thus impeded the movement of the striking plate, special auxiliary devices were devised to remove this disadvantage. Metal caps were provided which covered the guide bars while the molding box was being filled, which were automatically moved aside when the sliding body was moved forward, and which automatically dropped into their shielding position as soon as the striking projecting portions or ribs that engage the two lateral surfaces or sides of the supporting beams and thus act as guide members for guiding the striking plate, when it is shifted. The cam surfaces of the cam blocks consist of a horizontal fiat sliding surface and two surfaces at the two ends of the block which form obtuse angles with the horizontal surface. The striking plate is lifted by turning the cam block onto one of its end surfaces which also form fiat sliding surfaces upon which the block stands firm so as to be secure against undesirable tilting. The cam blocks are made of one piece, as a.

piece of cast steel, and as the striking plate is supported during shifting and at all other times upon fiat surfaces of the blocks, these latter donot need to be furnished with exchangeable supporting surfaces, and offer only a small resistance when shifted. In accordance with the invention the resistance offered by. block when it is shifted is still further reduced by supporting rollers that backward ofthe plate forthe purpose of L shaving off the protuberant parts of the partly finished tile, and also the shifting forward of the plate in its raised position, requires but little exertion on the part of theworkman. During the patting or striking operation the supporting rollers are swung into an inoperative position.

A constructional form of the invention is shown in the drawing in which- Figure 1 is a longitudinal section of the striking plate machine on the line 11 of Fig. 2,

Fig. 2 is an endview of Fig. 1 viewed from the left,

Fig. 3 is a diagrammatic representation of the striking plate and its mechanism in which theplate is shown in its lowest position, V

Fig. 4: is a similar representation showing the'plate in the inclined position in which it is pushed backward for the purpose of brushing or shaving off protuberant portions of a partly finished tile,

Fig. 5 is another diagrammatic representation illustrating the plate in the raised position that it occupies whilereturning to the front or patting position.

Fig. 6 is a side view of a cam block and a supporting bar-on an enlarged scale and Fig. 7 is an end view of Fig. 6.

'The striking plate a has bearings b for the shaft 0 of the front cam blocks and bearings d for the shafts of the rear cam blocks. The cam blocks 7" have four cor- .nered holes that fit-onto the four-cornered ends of the shaftsc and c. has a bottom flat supporting surface ,9 and Each block 7 two flat end surfaces 7t extending so as to form obtuse angles with the bottom fiat surface; The, perpendiculars drawn from the center of the square hole to the supporting surfaces 9 and hmeet these surfaces themselves, '5. 6., they do not intersect imaginary extensions of these surfaces. Hence the surfaces that bear the weight of the striking plate hold .it. securely in whatever Hence the shifting V position it is shifted into and prevent all.

unintended tilting of the same, no matter whether it rests on the surfaces 9. or the surfaces It of the cam blocks. Fixed on the shaft 0 of the front cam block is a lever i with a handle 1" and on the shaft of the rear cam block a lever is fixed. Both levers i and 7c are linked together by a. rod 7. The striking plate, the two levers 2' and la, and the link rod Z form a parallelogram. Hence when the lever 2' is rocked the lever 7c is also rocked in the same measure,and the front cam'blocks fixed on the shaft 0 and the rear cam blocks fixed to the shafte are always turned through equal angles. The cam blocks have lateral downwardly.

projecting laps 2 that extend beyond the which, when? the. how 0 is inthe position shown in Fig. 1, are outof engagement with the supporting barsor ra ls qpbut which travel on these rails when the how 0 1s 7 swung toward the handle 2" intohorizontal position.

Fig. 3 1s a dlagrammatlc representation of the parts of the machine on a reduced'scale in the'positions they occupy in Fig. 1. The striking plate is assumed to be located above a molding boX that is not shown in the drawing. By rocking the handle 2" to and fro the striking plate is alternately lifted and permitted to suddenly drop'so as to pack the material in the mol r V When the patting operation is finished the protuberant portions of the jmaterial' of which the partly finished tile is formed, are shaved off, and to do this the bow ois turned .down into the position shown in Fig. 4.

This causes the rear end of. the striking plate to belifted, while the front end remains in its lowest position, and issupported by the cam blocks 7 fixed onthe shaft 0. Hence the striking plate assumes the slanting position shown in Fig. 4. On the plate now being shifted to the rear, '5 0., in the direction indicated by the arrow, the front bottom edge of the plate brushes over the mold and shaves off protuberant portions of the partly finished tile. The shifting of the plate is facilitated through the principal part of its weight being borne by the wheels 79. When the striking plate has been moved to its rearmost' position, the completely molded roofing tile is removed in a known manner from the mold and the mold is refilled. Before the plate is returned to'its front position the cam blocks are turned by partly upon the left inclined surfaces h of the front cam blocks and chiefly upon the wheels p.

The plate a is now raised and can be restored to its patting position above the mold. This restoring movement can also be easily carried out because the greater part of the weight of the plate then also rests upon the wheels 79.

I claim:

1. In a tile making machine, rails, a striking plate, bearings attached to'the striking plate, cam blocks mounted and adapted to be shifted on the said rails, shafts fixed in the said cam blocks and journaled in the said bearings, a handle fixed to one of said shafts, and overlapping lateral edges on the cam blocks extending along the sides of the said. rails so as to form guide members for guiding the blocks when shifted.

2. In a tile making machine, rails, a striking plate, bearings attached to the striking plate, cam blocks mounted and adapted to be shifted 011 the said rails, shafts fixed in the said cam blocks and journaled in the said bearings, a handle fixed to one of said shafts, and overlapping lateral edges on the cam blocks extending along the sides of the said rails so as to form guide members for guiding the blocks when shifted, said cam blocks being formed with a normally horizontal flat surface and two adjoining flat surfaces forming obtuse angles with the horizontal flat surface.

In a tile making machine, rails, a striking plate, bearings attached to the striking plate, front and rear cam blocks adapted to be shifted on the said rails, rollers adapted to travel on the said rails, shafts journaled in some of the said bearings and fixed in the said. cam blocks, a roller shaft journaled in others of the said bearings, and arms piv oted at their one end to the roller shaft and to the said rollers at their other end, the distance between the pivots at both ends of one of said arms plus the radius of a roller being larger than the vertical distance between the roller shaft and the top of one of said rails.

i. In a tile making machine, rails, a striking plate, front and rear cam blocks adapted to be shifted on the said rails, rollers adapted to travel on the said rails, front and rear bearings attached to the striking plate and associated with the front and rear rollers, front and rear shafts journaled in the front and rear blocks and fixed in the front and rear cam blocks,,a roller bearing attached to the striking plate and situated nearer to the rear than to the said front bearings, a roller shaft journaled in the roller bearing, and arms pivoted at their one end to the roller shaft and at their other end to the said rollers, the distance between the pivots at both ends of one of said arms plus the radius of one of said rollers being larger than the vertical distance between the roller shaft and the top of one of said rails.

5. In a tile making machine, rails, a striking plate, front and rear cam blocks adapted to be shifted on the said rails, rollers adapted to travel on the said rails, front and rear bearings attached to the striking plate and associated with the front and rear rollers, front and rear shafts journaled in the front and rear blocks and fixed in the front and rear cam blocks, a roller bearing attached to the striking plate and situated nearer to the rear than to the said front bearings, a roller shaft journaled in the roller bearing, and arms pivoted at their one end to the roller shaft and at their other end to the said rollers, the distance between the pivots at both ends of one of said arms plus the radius of one of said rollers being larger than the vertical distance between the roller shaft and the top of one of said rails, said cam blocks being formed with a normally horizontal flat surface and two adjoining flat surfaces forming obtuse angles with the horizontal flat surface.

6. In a tile making machine, rails, a striking plate, front and rear cam blocks adapted to be shifted on the said rails, rollers adapted to travel on the said rails, front and rear bearings attached to the striking plate and associated with the front and rear rollers, front and rear shafts journaled in the front and rear blocks and fixed in the front and rear cam blocks, a roller bearing attached to the striking plate and situated nearer to the rear than to the said front bearings, a roller shaft journaled in the roller bearing, arms pivoted at their one end to the roller shaft and at their other end to the said rollers, the distance between the pivots at both ends of one of said arms plus the radius of one of said rollers being larger than the vertical distance between the roller shaft and the top of one of said rails, a handle fixed to the said front shaft, and overlapping lateral edges on the cam blocks extending along the sides of the said rails so as to form guide members for guiding the cam blocks when shifted, said cam blocks each being formed with a horizontal flat surface normally resting upon one of said rails and two adjoining flat surfaces forming obtuse angles with the horizontal flat surface.

In. testimony whereof I have signed this specification in the presence of two witnesses.

ARTHUR MiiLLEn.

Witnesses:

AnoLr GRASCHER, WILLY JANZ. 

